<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>有点小酷的input输入动画</title>
    <link rel="stylesheet" href="../css/4.css">
</head>
<body>
    <div class="wrapper">
        <div class="input-data">
            <input type="text" required>
            <div class="underline"></div>
            <label>您的姓名</label>
        </div>
    </div>
</body>
</html>